Re: [U-Boot] [PATCH] net: Mark the ip_udp_hdr struct as packed

On 12 Jul 2017, at 16:34, Maxime Ripard maxime.ripard@free-electrons.com wrote:

The -mno-unaligned-access flag used on ARM to prevent GCC from generating unaligned accesses (obviously) will only do so on packed structures.

It seems like gcc 7.1 is a bit stricter than previous gcc versions on this, and using it lead to data abort for unaligned accesses when generating network traffic.

Fix this by adding the packed attribute to the ip_udp_hdr structure in order to let GCC do its job.

Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com —

Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com